Spring Cloud发现首先根本不起作用
[英]Spring cloud discovery first does not work at all
问题描述
I try to implement a spring cloud netflix project with a eureka service registry, a configuration server and a client microservice. 
我尝试使用eureka服务注册表，配置服务器和客户端微服务来实现spring cloud netflix项目。 I use spring cloud finchley release. 我使用Spring Cloud Finchley版本。
I have two problems: 1. Eureka and configuration server are both running, but do not recognize each other. 我有两个问题：1. Eureka和配置服务器都在运行，但彼此无法识别。 I have read the official docs and multiple tutorials, but it does not work. 我已经阅读了官方文档和多个教程，但是没有用。 Here is my code: 这是我的代码：
ConfigServerApplication: ConfigServerApplication：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
@EnableDiscoveryClient
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}
bootstrap.yml of config server: 配置服务器的bootstrap.yml：
spring:
application:
name: config-server
cloud:
config:
server:
native:
search-locations: classpath:shared
profiles:
active: native
server:
port: 8888
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka
build.gradle of config server: 配置服务器的build.gradle
plugins {
id 'java'
id 'org.springframework.boot' version '2.0.3.RELEASE'
id "io.spring.dependency-management" version "1.0.5.RELEASE"
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
// let a BOM (Bill Of Materials) handle dependency versions that work together
dependencyManagement {
imports {
mavenBom 'org.springframework.cloud:spring-cloud-dependencies:Finchley.RELEASE'
}
}
dependencies {
// for SpringApplication
compile group: 'org.springframework.boot', name: 'spring-boot'
// for @SpringBootApplication
compile group: 'org.springframework.boot', name: 'spring-boot-autoconfigure'
// @EnableConfigServer
compile group: 'org.springframework.cloud', name: 'spring-cloud-config-server'
}
The service registry application code: 服务注册表应用程序代码：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class EurekaServiceRegistryApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServiceRegistryApplication.class, args);
}
}
bootstrap.yml from eureka: 来自尤里卡的bootstrap.yml：
spring:
application:
name: service-registry
server:
port: 8761
eureka:
client:
registerWithEureka: false
fetchRegistry: false
build.gradle from eureka: 来自尤里卡的build.gradle：
plugins {
id 'java'
id 'org.springframework.boot' version '2.0.3.RELEASE'
id "io.spring.dependency-management" version "1.0.5.RELEASE"
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
// let a BOM (Bill Of Materials) handle dependency versions that work together
dependencyManagement {
imports {
mavenBom 'org.springframework.cloud:spring-cloud-dependencies:Finchley.RELEASE'
}
}
// define the dependencies here
dependencies {
compile group: 'org.springframework.cloud', name: 'spring-cloud-netflix-eureka-server'
// for SpringApplication
compile group: 'org.springframework.boot', name: 'spring-boot'
// for @SpringBootApplication
compile group: 'org.springframework.boot', name: 'spring-boot-autoconfigure'
// @EnableDiscoveryServer and @EnableDiscoveryClient
compile group: 'org.springframework.cloud', name: 'spring-cloud-config-server'
}
Both apps run fine, but the config server doesn't registrate itself, any advice? 两个应用程序都可以正常运行，但是配置服务器不会自行注册，有什么建议吗？
The second problem: On starting the other microservice which should registrate first at eureka and then getting from there the address of the config server, it gives the following error: 第二个问题：在启动另一个应首先在eureka上注册的微服务，然后从那里获取配置服务器的地址时，它给出以下错误：
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-07-04 14:50:34.435 ERROR 28364 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of method configServerInstanceProvider in org.springframework.cloud.config.client.DiscoveryClientConfigServiceBootstrapConfiguration required a bean of type 'org.springframework.cloud.client.discovery.DiscoveryClient' that could not be found.
Action:
Consider defining a bean of type 'org.springframework.cloud.client.discovery.DiscoveryClient' in your configuration.
2018-07-04 14:50:34.440 ERROR 28364 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'discoveryClientConfigServiceBootstrapConfiguration': Unsatisfied dependency expressed through field 'instanceProvider'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'configServerInstanceProvider' defined in org.springframework.cloud.config.client.DiscoveryClientConfigServiceBootstrapConfiguration: Unsatisfied dependency expressed through method 'configServerInstanceProvider' parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.client.discovery.DiscoveryClient' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:373) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1350) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:137) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:197) ~[spring-cloud-context-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:104) ~[spring-cloud-context-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:70) ~[spring-cloud-context-2.0.0.RELEASE.jar:2.0.0.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:358) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:317) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
at de.tudresden.inf.rn.amcs.microservices.courseservice.CourseServiceApplication.main(CourseServiceApplication.java:13) [main/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'configServerInstanceProvider' defined in org.springframework.cloud.config.client.DiscoveryClientConfigServiceBootstrapConfiguration: Unsatisfied dependency expressed through method 'configServerInstanceProvider' parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.client.discovery.DiscoveryClient' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:732) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:474) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1256) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1105) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:503) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:584) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
... 30 common frames omitted
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.client.discovery.DiscoveryClient' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1509) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:818) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:724) ~[spring-beans-5.0.7.RELEASE.jar:5.0.7.RELEASE]
... 43 common frames omitted
The build.gradle of this service: 该服务的build.gradle：
plugins {
id 'java'
id 'org.springframework.boot' version '2.0.3.RELEASE'
id "io.spring.dependency-management" version "1.0.5.RELEASE"
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
// let a BOM (Bill Of Materials) handle dependency versions that work together
dependencyManagement {
imports {
mavenBom 'org.springframework.cloud:spring-cloud-dependencies:Finchley.RELEASE'
}
}
dependencies {
// for SpringApplication
compile group: 'org.springframework.boot', name: 'spring-boot'
// for @SpringBootApplication
compile group: 'org.springframework.boot', name: 'spring-boot-autoconfigure'
// @EnableDiscoveryServer and @EnableDiscoveryClient
compile group: 'org.springframework.cloud', name: 'spring-cloud-config-server'
// @EnableFeignClients
compile group: 'org.springframework.cloud', name: 'spring-cloud-netflix-core'
// CrudRepository
compile group: 'org.springframework.data', name: 'spring-data-jpa'
// @EnableFeignClients
compile group: 'org.springframework.cloud', name: 'spring-cloud-starter-openfeign', version: '2.0.0.RELEASE'
}
bootstrap.yml of this service: 该服务的bootstrap.yml：
spring:
application:
name: course-service
cloud:
config:
discovery:
enabled: true
serviceId: config-server
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka
the application class: 应用程序类：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class MicroServiceApplication {
public static void main(String[] args) {
SpringApplication.run(CourseServiceApplication.class, args);
}
}
It would be really nice, if someone could at least provide some hints or advices what to do. 如果有人至少可以提供一些提示或建议，那将非常好。 Thank you all! 谢谢你们！
1 个解决方案
解决方案1
0 已采纳 2018-07-04 13:45:47
I think your Eureka Server is not configured correctly. 我认为您的Eureka服务器配置不正确。
Try to replace: 尝试更换：
eureka:
client:
registerWithEureka: false
fetchRegistry: false
with this: 有了这个：
eureka:
instance:
hostname: localhost
client:
register-with-eureka: false
fetch-registry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
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